As I said, look at the whole picture. There are still some EMB guys in DFW that have EMB-DFW still on their bid sheets, which means when the EMB flying is over (just about is, still have some downgrade flights) those guys get to go wherever they want as long as their seniority can hold it. If they want the 70, they get it, (seniority dictating), so pilots below them get pushed off the plane and back to the 50, or wherever. For some reason the company doesn't mind being way overstaffed on the 50, but not the 70, probably for pay reasons.